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htmlcssborder-radius

Make pixeled border-radius

I have a game that looks a bit like a game from 1980. And i have this dialog:

#firstPageText {
            width: 300px;
            min-height: 100px;
            border: 2px solid;
            padding: 1em;
            margin: 0;
            position: absolute;
            bottom: 50px;
            left: 50%;
            -ms-transform: translate(-50%, 0%);
            transform: translate(-50%, 0%);
            font-family: 'Press Start 2P', cursive;
            border-radius: 5px;
        }
<link rel="preconnect" href="https://fonts.googleapis.com">
    <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
    <link href="https://fonts.googleapis.com/css2?family=Press+Start+2P&display=swap" rel="stylesheet">

<p id="firstPageText">
  This is a test text.
</p>

I wanted to add a border-radius to this dialog like the ones from pokemon:

Is there a way to achieve this pixeled border-radius, instead of the rounded border-radius?

Solution

  • I would consider mulitiple background:

    #firstPageText {
  --b:5px;  /* the thickness */
  --c:#000; /* the color */
  width: 300px;
  min-height: 100px;
  font-family: 'Press Start 2P', cursive;
  padding:calc(5*var(--b));
  position:relative;
}
  
#firstPageText::before,
#firstPageText::after { 
  content:"";
  position:absolute;
  inset:0 0 50% 0;
  background:
    linear-gradient(var(--c) 0 0) 50%   0  /calc(100% - 4*var(--b)) var(--b),
    linear-gradient(var(--c) 0 0) 0%   100%/var(--b) calc(100% - 2*var(--b)),
    linear-gradient(var(--c) 0 0) 100% 100%/var(--b) calc(100% - 2*var(--b)),
    conic-gradient(from  90deg,var(--c) 90deg,#0000 0) 0    0/calc(2*var(--b)) calc(2*var(--b)),
    conic-gradient(from 180deg,var(--c) 90deg,#0000 0) 100% 0/calc(2*var(--b)) calc(2*var(--b));
  background-repeat:no-repeat;
}
#firstPageText::after {
  transform-origin:bottom;
  transform:scaleY(-1);
}
    <p id="firstPageText">
  This is a test text.
</p>

    Apply different colors to understand the puzzle:

    #firstPageText {
  --b:10px; /* adjust this */
  width: 300px;
  min-height: 100px;
  font-family: 'Press Start 2P', cursive;
  padding:calc(5*var(--b));
  position:relative;
}
  
#firstPageText::before,
#firstPageText::after { 
  content:"";
  position:absolute;
  inset:0 0 50% 0;
  background:
    linear-gradient(red 0 0) 50%   0  /calc(100% - 4*var(--b)) var(--b),
    linear-gradient(blue 0 0) 0%   100%/var(--b) calc(100% - 2*var(--b)),
    linear-gradient(green 0 0) 100% 100%/var(--b) calc(100% - 2*var(--b)),
    conic-gradient(from  90deg,orange 90deg,lightblue 0) 0    0/calc(2*var(--b)) calc(2*var(--b)),
    conic-gradient(from 180deg,purple 90deg,lightblue 0) 100% 0/calc(2*var(--b)) calc(2*var(--b));
  background-repeat:no-repeat;
}
#firstPageText::after {
  transform-origin:bottom;
  transform:scaleY(-1);
  filter:hue-rotate(180deg);
}
    <p id="firstPageText">
  This is a test text.
</p>